Adsorption and separation properties of positively charged ZrO2 nanofibrous membranes fabricated by electrospinning. Issue 67 (1st September 2017)

• Record Type: Journal Article
• Authors: Tang, Yufei; Liu, Zhaowei; Zhao, Kang; Fu, Song
• Is Part Of: RSC advances. Volume 7:Issue 67(2017)
• Page Start: 42505
• Page End: 42512
• Publication Date: 2017-09-01
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c7ra08227d
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Positively charged ZrO2 nanofibrous membranes with high interception rate and adsorption capacity to separate and remove negatively charged particles. Abstract : As a new type of adsorption and separation materials, positively charged ceramics exhibit the advantages of safety and high separation efficiency. However, these materials possess low specific surface area and adsorption capacity. In this study, positively charged ZrO2 nanofibrous membranes were fabricated by electrospinning and calcination. The membranes were characterized in terms of morphology, composition, and pore structure. The adsorption and separation performance of the membranes on titan yellow solution was also investigated. Overlapping electrospun nanofibers formed nanofibrous membranes with porous structures (pore size of 0.2–1.6 μm) and a high specific surface area. Increasing the nanofiber diameter decreased the specific surface area of the nanofibrous membranes, and vacuum calcination increased their surface positive charge. The maximum flux of the positively charged ZrO2 nanofibrous membranes reached 523 L (m 2 h) −1, and the interception rate for titan yellow was 99.997%. The saturated adsorption capacity of vacuum-calcined ZrO2 nanofibrous membranes increased with increasing specific surface area, and their maximum adsorption capacity reached 20.93 mg cm −3 .